Packing.



Patented Oct. 2|, |902.

P. J. FLIMN.

P A C K I N G (Application led Nov. 14, 1901.)

(No Model.)

1N: Nonms PETERS co, mom-uma., WASHINGTON, u c,

UNITED STATES PATENT OEEICE.

PATRICK J. FLINN, OF BOSTON, MASSACHUSETTS, ASSIGNOR OF ONE-HALF TOHARLEY E. ROYCE, OF BROOKLINE, MASSACHUSETTS.

PACKING.

SPECIFICATION forming part of Letters Patent No. 711,761, dated yoctoberl21, 1902. l .Application filed November 14, 1901- Serial No. 82,243.(No model.)

To all whom, t may concern:

.Be it known that I, PATRIcK J .YFL1NN, of Boston, in the county ofSuffolk'andS-tateV of Massachusetts,have invented certain n ew anduseful Improvements in Packings, of which the following is aspecification.

This invention relates to packing for the piston-rods of steam-enginecylinders and pumps or for similar purposes, and it relates moreparticularly to packing formed with apertures or cavities for lubricantwhich is adapted to exude to the surface of the packing to lubricate thepiston-rod as `the packing is compressed.

The object of the invention is to provide an improved article ofmanufacture in which the portion formed with the apertures is so shapedas to retain its proper conformation under compression and prevent theclosing of the apertures and in which the face having the apertures isarranged to conform to thepiston-rod and insure the proper locationofthe aperture in the packing with respect to the piston-rod when thepacking is put in place.

Of the accompanying drawingsFigur e ll represents aside elevation of astrip or section of packing constructed in'accorda'nce with myinvention. Fig. 2 represents acrosssection thereof. Fig. 3 represents asectional view showing the packing in position in a stuffing-box. Fig. 4represents a Side elevation showing a packing of modified shape. Fig. 5represents a cross-section ofthe latter.

The same reference characters indicate the same parts in all thefigures.

The packing 1 is made tubular or with an interior cavity 2, adapted tocontain a lubricant 3. The walls of the tube are collapsible and may bevmade of any suitable material, alternate layers of fabric 4: and rubber5 being represented inthe drawings. Along one side of the tube its wallis perforated with a series of apertures 6 6, extending from the centralcavity 2 :to the exterior of the packing arranged to face thepiston-rodwhen the packing is in place, so that the lubricatingrmaterial may exude upon the piston-rod and ing, the outer orifices ofthese apertures be-A elongated transversely of the central longitudinalaxis of thetube l and inclined with respect to that axis.y vI have foundthat by thus shaping andarranging the apertures the lubricantis moreeffectively distributed upon the piston-rod and is less likely to clogsaid apertures, that the apertures retain their general shape and remainopen under compression, and that the wall or face of the tube 6o havingthe apertures is less liable to distortion under compression than withother shapes 01 arrangements of outlets for the lubricant. Theseadvantages would not be secured if the longer axes of the aperturesshould lie at an angle coinciding with or closely approaching the longeraxis of the packing, but are attained when the axes of the apertures arearranged asl shown-namely, at an inclination to the axis of the packing,but at a greater 7o angle thereto than to planes normal or perpendicularto said packing-axis. I claim this shape and arrangement of aperturesand substantial equivalents thereof as my invention, but do not claim,broadly, all tubular packings having an interior cavity for lubricantand apertures for the exit of said lubricant.

It will be observed that the form of packing shown in Figs. l to 3 isoval or substantially elliptical in shape', making atube whose 8ocross-sectional outline is more or less fiattened on two opposite faces,in one of which are located the outer orifices of the apertures 6. Thisshape I have found to be better lsuited to a packing having alubricant-cavity and apertures along one side than the circular outline,as it insures that the orifices will face the piston-rod when thepacking is put in place. In Fig. 3, in which 7 represents the piston-rodof a pump or engine, 8 the 9o stuiiingbox,and 9 the adj ustable glandtherefor, itrwill be seen that the helical coil of packing in the boxlies with the major axis of its oval or elliptical cross-sectionparallel --to the .piston-rod, the iattened face, which has theapertures 6, being next-to the pistonrod 7. In forming the packing intoa helix the tube is more easily coiled with its major laxis parallel tothat of the helix thanwith its minor axis parallel, and may be moreeasily Ioo made to conform to the piston-rod witha flattened face nextthe rod than with a rounded face next thereto. Lubricant-apertures mayalso have a wider distribution transversely of the packing in immediatecontiguity with the piston-rod on a flat-faced packing than on around-faced packing.

Figs. 4 and 5 show a form of packing ernbodying my invention and havinga rectangular cross-section. The packing may beprovided with a sheath orcover 10, of braided metal Wire, preferably brass or copper. to resistWear. Said cover extends across the oriices 6, but is ofsufliciently-open character to permit the lubricant to exude through it.This cover makes the packing particularly useful as a steam-packing.

It is obvious that the apertures 6 6 constitute a series of cavities,recesses, or pockets in the packing containing bodies of lubricant.

I claim- 1. A packing comprising an elongated compressible body havingunjoined ends adapting it to be Wrapped around a piston-rod and formedwith aplurality of recesses or cavities containing lubricant and of anelongated shape, said cavities lying with their longer axes at aninclination to the lont` axis of the packing but at a greater anglethereto than to planes normal to said packing-axis.

2. A packing comprising a tube with unjoined ends, formed with aninterior cavity containing lubricant and with outlet-apertures extendingtherefrom and of an elongated shape, said apertures lying with theirlonger axes at an inclination to the long axis of the packing but at agreater angle thereto than to planes normal to said packing-axis.

In testimony whereof` I have affixed my signature in presence of twoWitnesses. l

PATRICK J. FLINN.

y Witnesses:

HARLEY E. ROYCE, C. F. BROWN.'

